Independent heat dissipation and air conditioner compressor hydraulic driving system
Through the combination of variable pump assembly and two-position three-way reversing valve, the independent work of the air conditioning compressor motor and the heat dissipation motor is achieved, which solves the problems of high power loss and leakage risks in the existing technology, reduces energy consumption and layout difficulty, and Extend the service life of the equipment.
Patent Information
- Application Number
- CN202420846119.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the prior art, the air conditioner compressor motor cannot achieve separate operation, resulting in high power loss; the reversing control valve increases cost and layout difficulty, and increases the risk of oil leakage; the motor is prone to sucking empty when the compressor is shut down, shortening the service life. .
Using variable pump components, two-position three-way reversing valves and oil replenishment check valves, the independent and simultaneous work of the heat dissipation motor and the compressor motor are realized, and the leakage risk is reduced through the bidirectional swing angle, and a check valve is set to prevent the motor from sucking empty. .
The heat dissipation motor and compressor motor are realized separately or simultaneously, reducing energy consumption, reducing pipeline layout difficulty and leakage risks, and extending the service life of the compressor motor.
Smart Images
Figure CN222229054U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to an independent heat dissipation and air-conditioning compressor hydraulic drive system. Background Art
[0002] In the field of engineering machinery, especially large excavators, they are usually equipped with independent hydraulic oil cooling systems and air conditioning systems. Generally, the independent cooling system uses a hydraulic motor to drive the cooling fan to rotate to dissipate the hydraulic oil, and the air conditioning system drives the air conditioning compressor through the engine pulley or motor direct drive. It can also work in the form of a hydraulic motor driving the compressor. Using a hydraulic motor to drive the compressor can reduce costs and reduce installation space.
[0003] The hydraulic circuit commonly used in the prior art is a single pump driving dual motors, generally in the form of a series circuit, and its hydraulic system has four working states:
[0004] a. The compressor motor is working and the fan motor is working forward at the same time. At this time, the hydraulic pump supplies oil, the switching valve is energized, and the oil enters the B port of the compressor motor through the lower position of the switching valve, and then flows out through the A port of the compressor motor, so that the compressor motor rotates to drive the compressor to work normally; the oil then enters the C port of the fan motor through the upper position of the one-way valve and the control valve, and flows out from the D port of the fan motor through the control valve, the return oil cooling unit and the return oil filter unit back to the oil tank. At this time, the fan motor rotates forward;
[0005] b. The compressor motor is working and the fan motor is working in reverse. At this time, the fan motor is back-blowing to remove dust, the hydraulic pump is supplying oil, the switching valve is energized, and the oil enters the B port of the compressor motor through the lower position of the switching valve, and then flows out through the A port of the compressor motor, so that the compressor motor rotates to drive the compressor to work normally; the control valve is energized, and the oil enters the C port of the fan motor through the one-way valve and the lower position of the control valve, and flows out from the D port of the fan motor through the control valve, the return oil cooling unit and the return oil filter unit back to the oil tank. At this time, the fan motor is reversed;
[0006] c. The compressor motor does not work while the fan motor works in the forward direction. At this time, the hydraulic pump supplies oil, the switching valve is not powered, and the oil enters the upper oil inlet of the control valve through the upper position of the switching valve. At this time, the compressor motor does not work because there is no oil entering; the oil enters the C port of the fan motor through the upper position of the control valve, and flows out from the D port of the fan motor through the control valve, the return oil cooling unit and the return oil filter unit to return to the oil tank. At this time, the fan motor rotates in the forward direction;
[0007] d. The compressor motor does not work and the fan motor reverses. At this time, the hydraulic pump supplies oil, the switching valve is not energized, and the oil enters the upper oil inlet of the control valve through the upper position of the switching valve. At this time, the compressor motor does not work because there is no oil entering; the control valve is energized, and the oil enters the C port of the fan motor through the lower position of the control valve, and flows out from the D port of the fan motor through the control valve, the return oil cooling unit and the return oil filter unit back to the oil tank. At this time, the fan motor reverses.
[0008] However, the defects of the above control system are: 1. The air-conditioning compressor motor cannot achieve independent action, that is, as long as the compressor motor is working, it will drive the fan motor to work together, thereby increasing the power loss of the engine, and the energy-saving performance is relatively poor; 2. The prior art sets a reversing control valve in front of the fan motor to realize the forward and reverse rotation of the motor, which increases the cost and increases the difficulty of pipeline connection and layout, and at the same time increases the risk of oil leakage; 3. When the air-conditioning compressor is stopped, the B port of the compressor motor is easily sucked into the air, thereby reducing the service life of the compressor motor. Utility Model Content
[0009] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an independent heat dissipation and air-conditioning compressor hydraulic drive system.
[0010] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:
[0011] An independent heat dissipation and air conditioning compressor hydraulic drive system comprises a variable pump assembly, a first reversing valve, a second reversing valve, a heat dissipation motor and a compressor motor, wherein the oil suction port of the variable pump assembly is connected to a hydraulic oil tank, and the oil outlet is connected to an oil inlet of the first reversing valve; the first oil outlet of the first reversing valve is respectively connected to an A port of the compressor motor and a D port of the heat dissipation motor, the second oil outlet of the first reversing valve is connected to an oil inlet of a second reversing valve, the oil return port of the second reversing valve is connected in parallel to the D port of the heat dissipation motor and then connected to the hydraulic oil tank, and the oil outlet of the second reversing valve is respectively connected to a B port of the compressor motor and a C port of the heat dissipation motor.
[0012] A one-way valve is provided between the oil outlet of the second reversing valve and the B port of the compressor motor.
[0013] An oil replenishing one-way valve is arranged between the D port of the heat dissipation motor and the first oil outlet of the first reversing valve.
[0014] Preferably, the first reversing valve and the second reversing valve are both two-position three-way reversing valves.
[0015] Preferably, the compressor motor is a variable displacement piston motor or a fixed displacement piston motor.
[0016] Preferably, it also includes a main pump and an engine, and the main pump, the engine and the cooling pump are coaxially connected.
[0017] Preferably, the heat dissipation motor is a bidirectional variable motor.
[0018] Compared with the prior art, the beneficial effects of the utility model are:
[0019] 1. Through the combination of two two-position three-way reversing valves, the heat dissipation motor and the compressor motor can work separately or simultaneously, reducing energy consumption;
[0020] 2. The reversing function is realized by the bidirectional swing angle of the independent heat dissipation motor, which can reduce the risk of leakage, reduce the difficulty of pipeline layout and connection, and save installation space;
[0021] 3. When the compressor motor stops rotating, the compressor will continue to rotate due to inertia. When the oil inlet pressure of the compressor motor is too low, the hydraulic oil on the return oil side will be replenished to the oil inlet A of the compressor motor through the oil replenishment check valve to prevent the compressor motor from being sucked into the oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is the hydraulic principle diagram of the utility model.
[0023] In the figure: 1. hydraulic oil tank; 2. engine; 3. main pump; 4. variable pump assembly; 41. cooling pump; 42. variable piston cylinder; 43. flow control valve; 5. first reversing valve; 6. second reversing valve; 7. cooling motor; 8. oil replenishing one-way valve; 9. compressor motor; 10. one-way valve. DETAILED DESCRIPTION
[0024] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.
[0025] Embodiment 1:
[0026] like Figure 1 As shown, an independent heat dissipation and air conditioning compressor hydraulic drive system includes a main pump 3, an engine 2, a variable pump assembly 4, a first reversing valve 5, a second reversing valve 6, a heat dissipation motor 7 and a compressor motor 9. The main pump 3, the engine 2 and the variable pump assembly 4 are coaxially connected, and the oil suction port of the main pump 3 is connected to the hydraulic oil tank 1; the oil suction port of the variable pump assembly 4 is connected to the hydraulic oil tank 1, and the oil outlet is connected to the oil inlet A1 of the first reversing valve 5; the first oil outlet B1 of the first reversing valve 5 is respectively connected to the A port of the compressor motor 9 and the D port of the heat dissipation motor 7, the second oil outlet C1 of the first reversing valve 5 is connected to the oil inlet A2 of the second reversing valve 6, the oil return port C2 of the second reversing valve 6 is connected in parallel with the D port of the heat dissipation motor 7 and then connected to the hydraulic oil tank 1, and the oil outlet B2 of the second reversing valve 6 is respectively connected to the B port of the compressor motor 9 and the C port of the heat dissipation motor 7.
[0027] In this embodiment, the heat dissipation motor 7 is a bidirectional variable motor. When the swash plate angle of the heat dissipation motor 7 is at position a, the swash plate is at a positive swing angle, and the heat dissipation motor 7 rotates forward. When the swash plate angle of the heat dissipation motor 7 is at position b, the swash plate is at a reverse swing angle, and the heat dissipation motor 7 rotates reversely.
[0028] The variable pump assembly 4 is a variable piston pump composed of a heat pump 41, a variable piston cylinder 42 and a flow control valve 43. The oil outlet of the heat pump 41 is not only connected to the oil inlet A1 of the first reversing valve 5, but also connected to the oil inlet of the flow control valve 43. One end of the pressure oil at the oil outlet of the heat pump 41 is led to the control end of the flow control valve 43, and the other end controls the variable piston cylinder 42 through the flow control valve 43 to realize the variable of the variable piston pump.
[0029] Embodiment 2:
[0030] An independent heat dissipation and air conditioning compressor hydraulic drive system, which is different from the embodiment 1 in that a one-way valve 10 is provided between the oil outlet B2 of the second reversing valve 6 and the B port of the compressor motor 9, and the compressor motor 9 can be prevented from sucking air by adding the one-way valve 10 in front of the B port of the compressor motor 9. Specifically, the oil inlet of the one-way valve 10 is connected to the oil outlet B port of the compressor motor 9, and the oil outlet of the one-way valve 10 and the oil outlet B2 of the second reversing valve 6 are connected to the oil inlet C port of the heat dissipation motor 7.
[0031] An oil replenishment check valve 8 is provided between the D port of the heat dissipation motor 7 and the first oil outlet B1 of the first reversing valve 5. Further, one end of the D port of the heat dissipation motor 7 is connected to the oil inlet of the oil replenishment check valve 8, and the other end is connected to the oil return port C2 of the second reversing valve 6, and both are connected to the hydraulic oil tank 1.
[0032] Furthermore, the first reversing valve 5 and the second reversing valve 6 are both two-position three-way reversing valves.
[0033] Furthermore, the compressor motor 9 is a variable displacement piston motor or a fixed displacement piston motor.
[0034] The working principle of the utility model is:
[0035] The utility model has five working states: 1. The compressor motor 9 works alone; 2. The compressor motor 9 works and the heat dissipation motor 7 works in the forward direction at the same time; 3. The compressor motor 9 works and the heat dissipation motor 7 works in the reverse direction; 4. The compressor motor 9 does not work and the heat dissipation motor 7 works alone in the forward direction; 5. The compressor motor 9 does not work and the heat dissipation motor 7 works alone in the reverse direction.
[0036] 1. Compressor motor 9 works alone: engine 2 is coaxially connected to main pump 3 to drive main pump 3 to rotate, main pump 3 draws oil from hydraulic oil tank 1, and then delivers oil to working oil circuit through oil outlet to supply actuator to work. Heat dissipation pump 41 is coaxially connected to main pump 3, so that heat dissipation pump 41 draws oil from hydraulic oil tank 1, at this time, first reversing valve 5 is energized, works in left position, and oil output by heat dissipation pump 41 enters port A of compressor motor 9 through first reversing valve 5; at the same time, second reversing valve 6 is energized, works in left position, oil at port B of compressor motor 9 passes through check valve 10 and left position of second reversing valve 6 and returns to hydraulic oil tank 1, at this time, compressor motor 9 works normally. Since no oil enters heat dissipation motor 7 at this time, only compressor motor 9 works alone.
[0037] 2. The compressor motor 9 works and the heat dissipation motor 7 works in the forward direction: the heat dissipation pump 41 draws oil from the hydraulic oil tank 1. At this time, the first reversing valve 5 is powered and works in the left position. The oil output by the heat dissipation pump 41 enters the port A of the compressor motor 9 through the reversing valve 15. At this time, the second reversing valve 6 is not powered and works in the right position. The oil at the port B of the compressor motor 9 enters the oil inlet port C of the heat dissipation motor 7 through the one-way valve 10, and then returns to the hydraulic oil tank 1 through the oil outlet port D of the heat dissipation motor 7. At this time, the swash plate swing angle of the heat dissipation motor 7 is at the positive swing angle, and the heat dissipation motor 7 rotates in the forward direction.
[0038] 3. The compressor motor 9 works to dissipate heat, and the motor 7 works in reverse: the heat pump 41 draws oil from the hydraulic oil tank 1. At this time, the first reversing valve 5 is powered and works in the left position. The oil output by the heat pump 41 passes through the first reversing valve 5 and enters the port A of the compressor motor 9; at this time, the second reversing valve 6 is not powered and works in the right position. The oil at the port B of the compressor motor 9 passes through the one-way valve 10 and enters the oil inlet port C of the heat dissipation motor 7, and then returns to the hydraulic oil tank 1 through the oil outlet port D of the heat dissipation motor 7. At this time, the swash plate swing angle of the heat dissipation motor 7 is at the reverse swing angle, and the heat dissipation motor 7 is reversed.
[0039] 4. The compressor motor 9 does not work, and the heat dissipation motor 7 works alone in the forward direction: the heat dissipation pump 41 draws oil from the hydraulic oil tank 1. At this time, the first reversing valve 5 is not powered, and the first reversing valve 5 works in the right position. The oil output by the heat dissipation pump 41 passes through the first reversing valve 5 in the right position and comes out from the C1 port and enters the A2 port of the second reversing valve 6. At the same time, the second reversing valve 6 is not powered and the second reversing valve 6 works in the right position. The oil enters the oil inlet C port of the heat dissipation motor 7 through the B2 port of the right position of the second reversing valve 6, and then returns to the hydraulic oil tank 1 through the oil outlet D port of the heat dissipation motor 7. At this time, the swash plate swing angle of the heat dissipation motor 7 is at the positive swing angle, and the heat dissipation motor 7 rotates forward; since no oil enters the compressor motor 9 at this time, the compressor motor 9 does not work.
[0040] 5. The compressor motor 9 does not work, and the heat dissipation motor 7 works in reverse alone: the heat dissipation pump 41 draws oil from the hydraulic oil tank 1. At this time, the first reversing valve 5 is not powered, and the first reversing valve 5 works in the right position. The oil output by the heat dissipation pump 41 enters the A2 port of the second reversing valve 6 through the C1 port of the right position of the first reversing valve 5. At the same time, the second reversing valve 6 is not powered, and the second reversing valve 6 works in the right position. The oil enters the oil inlet port C of the heat dissipation motor 7 through the B2 port of the right position of the second reversing valve 6, and then returns to the hydraulic oil tank 1 through the oil outlet port D of the heat dissipation motor 7. At this time, the swash plate swing angle of the heat dissipation motor 7 is at the reverse swing angle, and the heat dissipation motor 7 reverses; since no oil enters the compressor motor 9 at this time, the compressor motor 9 does not work. Therefore, the compressor motor 9 and the heat dissipation motor 7 in the utility model can work simultaneously or separately.
[0041] When the compressor motor 9 stops rotating, the compressor will continue to rotate due to inertia. When the oil inlet pressure of the compressor motor 9 is too low, the hydraulic oil on its return oil side will be replenished to the oil inlet A of the compressor motor 9 through the oil replenishment check valve 8 to prevent the compressor motor 9 from being sucked out.
Claims
1. An independent heat dissipation and air conditioning compressor hydraulic drive system, characterized in that: The invention comprises a variable pump assembly (4), a first reversing valve (5), a second reversing valve (6), a heat dissipation motor (7) and a compressor motor (9); the oil suction port of the variable pump assembly (4) is connected to a hydraulic oil tank (1), and the oil outlet is connected to an oil inlet of the first reversing valve (5); the first oil outlet of the first reversing valve (5) is respectively connected to an A port of the compressor motor (9) and a D port of the heat dissipation motor (7); the second oil outlet of the first reversing valve (5) is connected to an oil inlet of the second reversing valve (6); the oil return port of the second reversing valve (6) is connected in parallel to the D port of the heat dissipation motor (7) and then connected to the hydraulic oil tank (1); the oil outlet of the second reversing valve (6) is respectively connected to the B port of the compressor motor (9) and the C port of the heat dissipation motor (7).
2. The independent heat dissipation and air conditioning compressor hydraulic drive system according to claim 1, characterized in that: A one-way valve (10) is provided between the oil outlet of the second reversing valve (6) and the B port of the compressor motor (9).
3. The independent heat dissipation and air conditioning compressor hydraulic drive system according to claim 1, characterized in that: An oil replenishment check valve (8) is provided between the D port of the heat dissipation motor (7) and the first oil outlet of the first reversing valve (5).
4. The independent heat dissipation and air conditioning compressor hydraulic drive system according to any one of claims 1 to 3, characterized in that: The first reversing valve (5) and the second reversing valve (6) are both two-position three-way reversing valves.
5. The independent heat dissipation and air conditioning compressor hydraulic drive system according to any one of claims 1 to 3, characterized in that: The compressor motor (9) is a variable displacement piston motor or a fixed displacement piston motor.
6. The independent heat dissipation and air conditioning compressor hydraulic drive system according to any one of claims 1 to 3, characterized in that: It also includes a main pump (3) and an engine (2), wherein the main pump (3), the engine (2) and a variable displacement pump assembly (4) are coaxially connected.
7. The independent heat dissipation and air conditioning compressor hydraulic drive system according to any one of claims 1 to 3, characterized in that: The heat dissipation motor (7) is a bidirectional variable motor.